{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["enabling technology", "application", "engineering feature", "manufacturing standard", "machine or equipment", "process characterization"], "input": "Since February 2014 , a major patent related to SLS expired ( Apparatus for producing parts by selective sintering n.d. ) ."}
{"enabling technology": [], "application": [], "engineering feature": [], "manufacturing standard": [], "machine or equipment": [], "process characterization": []}